Which type of appeal is sojourner truth making in “aint i a woman?” When she says that she gave birth to 13 children and saw them all sold into slavery

The rhetorical device of "pathos".

Explanation:

In her speech "Ain't I a woman", when the speaker Sojourner says that she gave birth to 13 children and saw them all sold into slavery, she is trying to invoke emotional appeal to the listeners.Also known as "Pathos", it is a rhetorical device that tries to persuade the readers and listeners through emotional and sentimental attributions. When the speakers says that all her children were sold to slavery, the listeners could feel the pain of a mother who has lost not one but thirteen of her children.

Her taking a guess here..